package com.from.menlo.park;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.hardware.Camera; 
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;

import java.io.IOException;
import java.lang.reflect.Method;
import java.util.List;

import com.from.menlo.park.db.DbUtile;
 

import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.FrameLayout;

public class CameraActivity extends Activity {
	private static final String TAG = "CameraActivity";
	Camera camera;
	Preview preview;
	Button buttonClick;
	protected DbUtile myDBHelper;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.camera);

		preview = new Preview(this);
		((FrameLayout) findViewById(R.id.preview)).addView(preview);

		
		
		buttonClick = (Button) findViewById(R.id.buttonClick);
		buttonClick.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				preview.mCamera.takePicture(shutterCallback, rawCallback,
						jpegCallback);
			}
		});

		myDBHelper = new DbUtile(this);
		Log.d(TAG, "onCreate'd");
	}

	ShutterCallback shutterCallback = new ShutterCallback() {
		public void onShutter() {
			Log.d(TAG, "onShutter'd");
		}
	};

	/** Handles data for raw picture */
	PictureCallback rawCallback = new PictureCallback() {
		public void onPictureTaken(byte[] data, Camera camera) {
			Log.d(TAG, "onPictureTaken - raw");
		}
	};

	/** Handles data for jpeg picture */
	PictureCallback jpegCallback = new PictureCallback() {
		public void onPictureTaken(byte[] data, Camera camera) {
			 SQLiteDatabase db = myDBHelper.getReadableDatabase();
			    ContentValues values = new ContentValues();
			    values.put("image", data);
			    db.insert("images", "tag", values);
			   
			Log.d(TAG, "onPictureTaken - jpeg");
		}
	};
    public void onResume(){
    	super.onResume(); 
        preview.setCamera(Camera.open());
    }
    
    @Override
    protected void onPause() {
        super.onPause();
        preview.closeCamera();
    }
}
class Preview extends ViewGroup implements SurfaceHolder.Callback {
    private final String TAG = "Preview";

    SurfaceView mSurfaceView;
    SurfaceHolder mHolder;
    Size mPreviewSize;
    List<Size> mSupportedPreviewSizes;
    Camera mCamera;

    Preview(Context context) {
        super(context);

        mSurfaceView = new SurfaceView(context);
        addView(mSurfaceView);

        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = mSurfaceView.getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }
    public void closeCamera(){
    	if ( mCamera != null ){
    		     mCamera.release();
    		            mCamera = null; 
    	}
    }
    public void setCamera(Camera camera) {
        mCamera = camera;
        if (mCamera != null) {
        	
        	
        	try {
    			Method SupportedPreviewSizesMethod = Camera.Parameters.class.getMethod(
    					"getSupportedPreviewSizes");
    			 mSupportedPreviewSizes =(List<Size>)SupportedPreviewSizesMethod.invoke(mCamera.getParameters() );
    			/* success, this is a newer device */
    		} catch (Exception nsme) {
    			/* failure, must be older device */
    			Log.e("getSupportedPreviewSizes", "failure, must be older device ");
    		}
        	
        	 
            requestLayout();
        }
    }

    public void switchCamera(Camera camera) {
       setCamera(camera);
       try {
           camera.setPreviewDisplay(mHolder);
       } catch (IOException exception) {
           Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
       }
       Camera.Parameters parameters = camera.getParameters();
       parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
       requestLayout();

       camera.setParameters(parameters);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // We purposely disregard child measurements because act as a
        // wrapper to a SurfaceView that centers the camera preview instead
        // of stretching it.
        final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
        final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec);
        setMeasuredDimension(width, height);

        if (mSupportedPreviewSizes != null) {
            mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, width, height);
        }
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        if (changed && getChildCount() > 0) {
            final View child = getChildAt(0);

            final int width = r - l;
            final int height = b - t;

            int previewWidth = width;
            int previewHeight = height;
            if (mPreviewSize != null) {
                previewWidth = mPreviewSize.width;
                previewHeight = mPreviewSize.height;
            }

            // Center the child SurfaceView within the parent.
            if (width * previewHeight > height * previewWidth) {
                final int scaledChildWidth = previewWidth * height / previewHeight;
                child.layout((width - scaledChildWidth) / 2, 0,
                        (width + scaledChildWidth) / 2, height);
            } else {
                final int scaledChildHeight = previewHeight * width / previewWidth;
                child.layout(0, (height - scaledChildHeight) / 2,
                        width, (height + scaledChildHeight) / 2);
            }
        }
    }

    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, acquire the camera and tell it where
        // to draw.
        try {
            if (mCamera != null) {
                mCamera.setPreviewDisplay(holder);
            }
        } catch (IOException exception) {
            Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Surface will be destroyed when we return, so stop the preview.
        if (mCamera != null) {
            mCamera.stopPreview();
        }
    }


    private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
        final double ASPECT_TOLERANCE = 0.1;
        double targetRatio = (double) w / h;
        if (sizes == null) return null;

        Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;

        int targetHeight = h;

        // Try to find an size match aspect ratio and size
        for (Size size : sizes) {
            double ratio = (double) size.width / size.height;
            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }

        // Cannot find the one match the aspect ratio, ignore the requirement
        if (optimalSize == null) {
            minDiff = Double.MAX_VALUE;
            for (Size size : sizes) {
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }
        return optimalSize;
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // Now that the size is known, set up the camera parameters and begin
        // the preview.
        Camera.Parameters parameters = mCamera.getParameters();
        if ( mPreviewSize != null )
            parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
        else 
        	 parameters.setPreviewSize(w,h);	
        requestLayout();

        mCamera.setParameters(parameters);
        mCamera.startPreview();
    }

}